Segmental gear-wheel.



j UNITED srirrns PATENT OFFICE.

SEGMENTAL GEAR-WHEEL.

ivo. 826,129.

Specicaton of Letters Patent.

Patented July 17, 1906.

,Application filed November 16, 1905. Srl'al N0. 287.589.

To LZZ whom, t may concern:

Be it known thatI, EDWARD L. TROUP, a

. citizen ofthe United States, and a resident of tion of the mechanism of which it forms a Vpart until the wheel can be removed and replaced. The removal of a broken gear-wheel -often involves the dismemberment of a machine at great expense of labor and loss of time and when such breakage occurs in carmotors at great inconvenience to the public.

The object of my invention is to provide a strong and durable gear-wheel the cogs of which are readily attached and detached in segments Without the removal of the main body portion of the wheel from the shaft on which it is mounted or the detachment of the 'shaft from the body of the machine or mechanism of which it forms a part. I accomplish these objects by constructing a gearwheel in parts adapted to'be assembled and locked together, as hereinafter described, and illustrated in the drawings, in which- Figure 1 is a side elevation of a gear-wheel constructed in accordance with my invention, showing the lock-disk partly broken away and cog-segments removed. Fig. 2 is a diametric section of the wheel complete on line of Fig. 1; andFig. 3 is a similar section of the main body portion of the wheel, partly broken away, with the cog-segments and lock-disk removed.

In the drawings, 1 represents the main body portion of a gear-wheel constructed in accordance with my invention, which is provided with an integral hub 2, having the outwardly-threaded projecting portion 3 and a bore 4 of suitable diameter for the shaft 5, on which it is to be fixedly mounted. The body vportion 1 is also provided with a rim 6, that is integral with a web 7 of the hub and concentric to the bore 4, forming a cog-base 8 and a retaining-flange 9, the iiange forming a shoulder 10 at one side of the cog-base. The shoulder 10 has formedv therein the lateral annular groove 11, the-inner side 12 of which forms an extension of the cog-base into the flange 9, and the outer side 13 of the groove is preferably beveled inward toward the base from the face of the shoulder 10. The cogbase has formed therein at diametric points transverse grooves 14, in which are mounted the stops 15, having portions projecting above the cog-base and radial thereto a less distance than the flange 9.

Upon the cog-base of the body portion 1 there is mounted an annular cog-rim 16 of uniform radial thickness, the inner face of which is adapted to closely fit around the cog-base. The cog-rim 16 is of a radial thickness greater than the radial projection of the flange 9 of the body portion -1 of the wheel and has formed concentric around its inner portion on each side a rabbeted concentric groove 17 and a tongue-flange 18. The cogrim 16 has formed in its outer circumferential portion at equal intervals the cogs 19 of equal depth and pitch, and the rim is radially divided into segments 20 of any desired lengthof arc, the divisions being made 'midway between two cogs, as shown in Fig. 1.

21 represents a locking-disk having a central hub 22, bored and internally threaded to run on the threaded portion 3 of the hub 2 of the main body portion 1, a recessed web 23, and a thickened rim portion 24, rabbeted on its inner face to form the circumferential shoulder 25, the side shoulder. 26, and the annular groove 27. The rim-face 28 of the disk is of a diameter e ual to the diameter of the rim-face 28 of t e flange 8 of the body portion 1, and the groove 27 is opposite the groove 11 in the flange 9 and is of equal size, shape, and depth, and each are adapted to receive one of the tongue-anges 18 of the cog-rim segments 20, while the opposite grooves 17 of the cog-rim are adapted to receive the tongue-flanges 29 of the iiange 9 and the rim 24, formed by the grooves 11 and 27. The outer circumferential faces of the tongue-flanges 18 are beveled to coincide 'with the beveled face 13 of the tongueflanges 29 of the iiange 9, and the disk-rim 24 and the inner circumferential shoulders 30 and 30 of the cog-segments, which are formed by the rabbeted grooves 17, are adapted to coincide with the rim-faces 28 and 28 of the disk-rim 24 and the iiange 9, respectively, and rest thereon as a base. The cog-segments 20, which abut at the stops 15, have incuts 31 to receive the projecting portion of the stops, whereby the cog-segments are shouldered against the stops and prevented from turning on the cog-base of the main ICO IIO

body portion 1 of the wheel, and the hub 2 is provided with the grooves 32 to receive the spline or feather 33 of the shaft 5. Thus constructed the parts of the wheel are assembled and locked together as a whole by first assembling the cog-segments around the cog-base of the main body portion of the wheel, with the tOngue-ianges Y18 of one side of each segment in the groove 11 of the flange 9 and the tongue 29 of the fiange 9 in the adjacent groove 17 of the cog-seg-l ments and with the segments having the incuts 31 abutting the stops 15. The locking-disk 21 is then run on the threaded portion 3 of the hub 2 of the main body portion 1 by a wrench, which is adapted to engage the disk by means of the apertures 34, provided in the web 23, until ythe shoulder 26 abuts the cog-base and the tongue-flanges 18 and 29 are in their respective Vopposite grooves 27 and 17. In this position the cogsegments are securely locked and held firmly seated around the cog-base and between the disk 21 and the flange 9 by the interlocking tongues 18 of the segments extending into the opposite grooves l1 and 27, respectively, of the flange 9 and the disk 21, and by the tongues 29 of the fiange 9 and the disk 21, extending into the grooves 17 of the cogsegments, with the outer sides of the flange 9 and the rim 24 of the disk fiush with the sides of the outerportion of the cog-segments. It is "apparent that when the parts are so locked together by the disk 23 there will be no tendency in the operation of the wheel to unscrew the disk 23 from the threaded portion 3 of the hub 2, as the cogsegments being locked against circumferential movement on the cog-base .of the main body portion power applied to the cog-segments can have no eflect to either tighten or loosen the disk, and it is also apparent that the disk may be loosened for the removal of a broken segment and the substitution of .a new one without removing the body of the wheel or the disk from the shaft and without disturbing the other segments or having to remove the shaft.

To facilitate the tightening or loosening of the disk 23, the web of the body portion 1 of the wheel may be provided with the apertures 35, as shown in Fig. 3 ,for the applica- Ation of the'wrench thereto in opposition to a wrench similarly applied to the disk.

What I claim to be new is- 1. In a segmental gear-wheel, the combination of a main body portion having a hub provided with an externally-threaded end portion, and with `a concentric rim adapted for a cog-base, said rim being provided with a grooved shoulder-flange at one side, a locking-disk having a grooved rim adapted to shoulder againlt the cog-base rim on the opposite side, and a hub axial to the disk that is internally threaded and adapted to be run 6 5 on the threaded portion of the hub of the main body portion, and cogged segments adapted to be mounted on the cog-base rim and together form a complete cogged rim around the base, concentric thereto, said segments being provided on their opposite sides with flanges and `grooves respectively complementary to the grooved flange of the body portion and the rim ofthe disk, and adapted to be interlocked therewi th,.andsecured thereby, around and vupon the cog-ibase rim,wvhen the'disk is run on the hub .of the bodyportion until shouldered against the cog-baserim, and means tolock the segments against ,movement around the cog-base rim, substantially as set forth. l

2. In a segmental gear-wheel, the combination of a main vbody -`portionhavingan lin- -tegral hub provided .with an externallythreaded end portion, `and withia ,cog-.base

rim that is concentric yto the .hub and provided with a grooved shoulder-flangeat `one side, and with ,transverse grooves, radial stops .secured in the transverse -,gfrooves alockingdisk having a hub internally threaded and adapted to be run on the threadedendof the hub of the main ybody portion, and provided with a rim lhaving a groove-opposite r'to-"the groove of the shoulder-,flangeof the cog-'base rim, cogged segments adapted vto ether to form a cogged rim .around .the cog-A ase rim, the segments being provided with incuts adapting `them to shoulderagainst the radial stops, and having .side flanges complementary to the grooves of the shoulder-angegand the rim ofthe locking-disk, l.and to fextend into the grooves of the lshoulder-flangeand the disk-rim when the `disk .is run onto the' hub of the bodyportion until it iscompressed on the cog-base rim substantially as set forth.

3. A segmental gear-wheel comprising Aa main body portion provided witha hub having an exteriorly-.threadedend portion, and a cog-base rim concentric to the hub .and integrally connected therewith a web, said rim having transverse grooves, yand .being provided with a vconcentric flange forming a shoulder at one side of the cog-base-rim that is provided Witha lateral annulargroove eX- tending the cog-base, radi a'l stops mounted in the transverse grooves, cog-ged segments mounted on the cog-base, and forminga complete rim around and coinciding with the cogbase and having incuts to receive the `radial stops, andside rabbets and grooves forming annular tongue-flanges around the base portion of the cogged rim, and-.a locking-disk having a central hub bored and internally threaded to run on the threaded portionof the hub of the main body portion, and a rim rabbeted and grooved complementary to the cog-base rim, and the segments, and adapted to interlock the segments between and with the disk- IOO IIO

rim and the shoulder-flange of the cog-base rim When the disk is run in on the hub of the main body portionA 4. In a segmental gear-Wheel, the combination of a main body portion having a hub extension externally threaded, and a concentric cog-base rim that isprovided With a shoulder-flange, a locking-disk provided Wi th an internally-threaded hub adapted to be run on to the hub extension of the main body portion, and a rim concentric to the hub having a diameter equal to the diameter of the shoulder-flange, and cogged segments adapted to fit around and to form a complete cogged rim around the cog-base rim, the segments, the

A shoulder-flange, and the disk-rim, being provided With complementary interlocking means adapting the segments to be interlocked between the shoulder-Hange and the rim oi the disk When the disk is run on to the hub of the main body portion, and the cogbase rim being provided With transverse radial stops, and the segments with incuts to receive the stops.

In Witness whereof I have hereunto signed my name, in the presence of tWo subscribing Witnesses, this 10th day of November, 1905.

EDWARD L. TROUP.

Witnesses:

' S. E. INIAUMLER,

ANNA M. FRIEDRICHE. 

